The following items are desirable for articles of all levels, although the detail will vary depending on several factors. These items do not need to be separated into distinct sections; text should flow in continuous prose so far as possible. The order this information is included is also relatively unimportant, although the order listed is generally preferred.

Description (physical, behavioral) - what makes this (group of) critter(s) different from its close relatives? Include here evidence about cognitive capacities.

Habitat - where does it live? how broadly does it roam? maps are good

Cultural, Religious, Economic, etc. Importance - what impact has it had on humans? Include here use for experimental purposes that do not relate to other headings.